> Frank,
>
> This is similar to those that try a pipe thread water temp sensor to
> fit a straight thread manifold (original or real LAT intake). There
> was my documented intake manifold cure of welding the pipe thread hole
> shut on the aluminum manifold, and retapping the correct straight
> thread, off the car.
> In this instance there is not enough material to retap the pipe
> thread, and an adapter lifts the sensor out of the water flow.
>
> I recently saw a post by John Clark <clarkjc@runbox.com> about a
> carbon steel thread insert adapter for a 3/8 NPT to a 5/8-18 SAE
> inside concentric threads and E-Z Lok. Larger than original external
> pipe thread and correct sensor thread in a single thickness insert.
> It requires enough "meat" to drill and tap the original hole to the
> larger pipe thread, insertion of the stainless adapter, and then
> normal use of the straight thread center hole.
>
> QUOTE from John:
>
> > "Hi Bob,
>
> > My solution for the temperature sender was to install a carbon steel
> thread insert from a company called E-Z Lok. > I drilled out the 3/8"
> NPT tapped hole that was there with a 49/64 bit, tapped it to 7/8-9,
> and screwed in the thread > insert. The thread insert, E-Z Lok part
> #329-10F, is 7/8-9 on the outside and 5/8-18 on the inside. The top
> of the > temp. sender covers up the thread insert, so you never even
> see it.
> >
> > You can get free samples from E-Z Lok at http://www.ezlok.com/ or
> you can order them from the McMaster-Carr
> > catalog.
> >
> >- John "
>
>> Hi,
>>
>>
>>
>> Tomorrow looks like it will be the day I start the Tiger. Tonight I
>> installed the fluids and everything went well except I found that the
>> knock
>> sensor leaks where it screws into the pipe thread adaptor at the water
>> jacket port. The stud on the knock sensor is a very coarse threaded
>> 3/8"
>> affair. The sensor came with an adaptor to pipe thread for the block
>> bosses. I was a little concerned about a leak developing between the
>> straight thread sensor stud and the adaptor and sure enough.
>>
>>
>>
>> Anyhow, my first impression is to relocate the sensor to a blind boss
>> on the
>> other side of the engine. However, since everything is already wired
>> for
>> the current location I'd like to take one more shot at sealing this
>> thing.
>> I'm thinking of finding a copper or aluminum washer to go between the
>> adaptor and the sensor and then use a thick coat of Teflon sealer
>> goop on
>> the threads. Do you think this will work? Any better ideas?
>>
>>
>>
>> Thanks!
>>
>>
>>
>> Frank
>>
>> B9471116
>
>
--
-----
Steve Laifman
Editor
http://www.TigersUnited.com
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